CN110493890A

CN110493890A - A kind of connection restoration methods, access and mobile management function to ps domain entity and user equipment

Info

Publication number: CN110493890A
Application number: CN201910722201.5A
Authority: CN
Inventors: 李欢; 于游洋
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-03-18
Filing date: 2017-03-18
Publication date: 2019-11-22
Anticipated expiration: 2037-03-18
Also published as: RU2738262C1; EP3592098A4; CN110199568A; JP6940122B2; WO2018170626A1; US11129225B2; CN110199568B; EP3592098A1; US11805566B2; US20200015309A1; EP3592098B1; KR20190125440A; KR102293232B1; BR112019019285A2; US20220078874A1; CN110493890B; JP2020512744A

Abstract

A kind of connection restoration methods, access and mobile management function to ps domain entity and user equipment, to provide a kind of connection recovery scheme for making user equipment be converted to connected state from Idle state when user equipment accesses net access 5G core net and be in Idle state by N3GPP.Method includes: access and mobile management function to ps domain entity receives the first message that conversation management functional entity is sent, and carries first in first message and restores instruction.Access and mobile management function to ps domain entity storage first restore instruction.User equipment accesses net by N3GPP and sends second message to access and mobile management function to ps domain entity.Access and mobile management function to ps domain entity access net by N3GPP and restore to indicate to send third message to user equipment according to first, and connection is carried in third message and restores to indicate, restores the connection for the PDU session that the side N3GPP is established to notifying user equipment.User equipment accesses net by N3GPP and initiates second service request.

Description

A kind of connection restoration methods, access and mobile management function to ps domain entity and user equipment

Technical field

This application involves field of communication technology more particularly to a kind of connection restoration methods, access and mobile management function to ps domain Entity and user equipment.

Background technique

In cordless communication network framework, core net allows user equipment (User End, UE) to pass through 3GPP (3rd Generation Partnership Project, third generation partner program) it accesses net access, pass through N3GPP (non- 3GPP, non-3 gpp) it accesses net access or nets while accessing by 3GPP access net and N3GPP access.Net is accessed by 3GPP Access refers to user equipment using technology core network access as defined in 3GPP, for example, user equipment accesses core using base station manner Heart net；And net access is accessed by N3GPP and refers to user by technology core network access as defined in non-3 gpp, for example, user adopts With Wifi (Wireless Fidelity, the WLAN based on IEEE 802.11b standard) mode core network access.

In 5G network, when user equipment accesses net core network access by 3GPP, if user equipment is in a period of time Do not carry out data transmission inside, then user equipment can enter Idle state (IDLE state) from connected state (CONNECTED state), and release is empty Mouth and NAS (Non-Access Stratum, Non-Access Stratum) signaling connection, to reach saving Internet resources, reduction user sets The purpose of standby power consumption；When thering is downlink data to reach or user equipment will send upstream data or signaling, user equipment Connected state can be converted to from Idle state.

When user equipment accesses net access 5G core net by N3GPP, user equipment also available free state and connected state it Point.But user is handed down to when receiving in the PDU of the side N3GPP (Protocol Data Unit, protocol Data Unit) session When the downlink data of equipment, there is no the sides for how making user equipment be converted to connected state from Idle state in existing 5G network Case.Therefore, when user equipment is in Idle state, since the resource of N3GPP access net is released, thus there ought be downlink data User equipment can not be paged when arrival, so as to cause downlink data transmission failure.

Therefore, when user equipment accesses net access 5G core net by N3GPP and user equipment is in Idle state, urgently A kind of connection recovery scheme that user equipment can be made to be converted to connected state from Idle state is needed, to guarantee that downlink data can be passed successfully It is defeated.

Summary of the invention

The embodiment of the present application provides a kind of connection restoration methods, access and mobile management function to ps domain entity and user equipment, To provide a kind of use when user equipment accesses net access 5G core net by N3GPP and user equipment is in Idle state Family equipment is converted to the connection recovery scheme of connected state from Idle state, guarantees downlink data energy Successful transmissions.

In a first aspect, the embodiment of the present application provides a kind of connection restoration methods, this method comprises: access and mobile management Functional entity receives the first message that conversation management functional entity is sent, which carries first and restore instruction, for referring to Show the connection for restoring the PDU session that user equipment is established in the side N3GPP.

When user equipment is when the side N3GPP is in Idle state, access and mobile management function to ps domain entity storage first restore Instruction；Access and mobile management function to ps domain entity access net by N3GPP and receive the second message that user equipment is sent, this second Message is periodic registration request or first service request；Access and mobile management function to ps domain entity access net by N3GPP Restore to indicate to send third message to user equipment according to first, connection is carried in the third message and restores to indicate that user is notified to set The standby connection for restoring the PDU session；Alternatively,

When user equipment is when the side N3GPP is in Idle state, access and mobile management function to ps domain entity are to session management function Energy entity sends the 4th message, and it is unreachable that the 4th message is used to indicate user equipment.

When user equipment is in Idle state, access and mobile management function to ps domain entity are receiving conversation management functional reality After the first message that body is sent, storage first restores instruction, and initiates periodic registration request or the first clothes in user equipment After business request, restores instruction according to described first and send third message to the user equipment, and the company of carrying in third message Recovery instruction is connect, to indicate that user equipment restores the connection for the PDU session that user equipment is established in the side N3GPP.Therefore, it uses The connection restoration methods that first aspect provides only can access net core network access by N3GPP in user equipment and user sets When for being in Idle state, a kind of connection recovery scheme for making user equipment be converted to connected state from Idle state is provided, so that user Equipment restores the connection of above-mentioned PDU session.

It should be noted that first restores the session identification for indicating to can be the PDU session.Connection, which restores instruction, can wrap Containing following one or more: session identification, the wireless access type of the PDU session and the connecing for the PDU session of the PDU session Network identification.

Based in a first aspect, in one possible implementation, receiving meeting in access and mobile management function to ps domain entity After talking about the first message that management function entity is sent, access and mobile management function to ps domain entity obtain data buffer storage timer, When data buffering timer has not timed out, access and mobile management function to ps domain entity access net by N3GPP and restore according to first It indicates to send third message to user equipment.

Optionally, access and mobile management function to ps domain entity can also be determined the data buffer storage by conversation management functional entity When device be sent to user plane functions entity, at this point, the data buffer storage timer may be used to indicate user plane functions entity caching under The duration of row data.That is, user plane functions entity in the data buffer storage timer expiry, is discarded in the PDU session and issues To the downlink data of user equipment.

Based in a first aspect, in one possible implementation, in access and mobile management function to ps domain entity to session Before management function entity sends the 4th message, access and mobile management function to ps domain entity can initiate next time according to user equipment The time of periodic registration request judges whether to send the 4th message.

If user equipment initiate next time periodic registration request time judge it is longer apart from current time, access with Mobile management function to ps domain entity can send the 4th message to conversation management functional entity and indicate that user equipment is unreachable, then session Management function entity can notify the user that face functional entity will be handed down to the lower line number of the user equipment after receiving the 4th message According to discarding, result in waste of resources so that user plane functions entity be avoided to save the downlink data for a long time.

Second aspect, the embodiment of the present application provides a kind of connection restoration methods, this method comprises: user equipment passes through N3GPP accesses net and sends second message to access and mobile management function to ps domain entity, which is periodic registration request Or first service request；User equipment accesses that net receives access and mobile management function to ps domain entity is sent the by N3GPP Three message carry connection in the third message and restore instruction notifying user equipment and built by N3GPP access network recovery in the side N3GPP The connection of vertical PDU session；User equipment accesses net by N3GPP and initiates second service request, and second service request is used for Request restores the connection of the PDU session.

Wherein, connection restore instruction include one or more of: the session identification of the PDU session, the PDU session nothing Line access style, the PDU session connect network identification.

The third aspect, the embodiment of the present application provide a kind of connection restoration methods, this method comprises: access and mobile management Functional entity receives the first message that conversation management functional entity is sent, which carries first and restore instruction, for referring to Show the connection for restoring the PDU session that user equipment is established in the side N3GPP；When user equipment is when the side N3GPP is in Idle state, connect Enter and net is accessed according to the first recovery instruction to user equipment transmission second message by 3GPP with mobile management function to ps domain entity, is somebody's turn to do Second message is used to indicate the connection that user equipment restores the PDU session.

Wherein, first restores the session identification that instruction includes the PDU session.

When user equipment is in Idle state, access and mobile management function to ps domain entity are receiving conversation management functional reality After first message that body issues, carrying the first recovery instruction, net is accessed by 3GPP and is set according to the first recovery instruction to user Preparation send second message, indicates that user equipment restores the connection for the PDU session that the above-mentioned side N3GPP is established by second message.With Family equipment can initiate service request according to the instruction of second message, to restore above-mentioned N3GPP after receiving second message The connection for the PDU session that side is established.In the connection restoration methods that the third aspect provides, since user equipment is connect by 3GPP Networking core network access, then access and mobile management function to ps domain entity can access net by 3GPP and send second to user equipment Message, to indicate that user equipment restores the connection for the PDU session that the above-mentioned side N3GPP is established.The company provided using the third aspect Restoration methods are connect, net can be accessed by 3GPP respectively in user equipment and N3GPP accesses net core network access and user sets For when the side N3GPP is in Idle state, a kind of connection for making user equipment be converted to connected state from Idle state in the side N3GPP is provided Recovery scheme guarantees the downlink data of the side N3GPP so that user equipment restores the connection for the PDU session that the above-mentioned side N3GPP is established It can Successful transmissions.

Based on the third aspect, in one possible implementation, access and mobile management function to ps domain entity pass through 3GPP It accesses net and restores instruction to user equipment transmission second message according to first, second message is used to indicate user equipment and restores PDU The connection of session can specifically be realized by the following two kinds mode:

The first

Access and mobile management function to ps domain entity determine that user equipment when the side 3GPP is in connected state, is accessed by 3GPP Net restores instruction according to first and sends a notification message to user equipment, and connection is carried in the notification message and restores instruction, the connection Restore instruction and is used to indicate the connection that user equipment restores PDU session.

Second

Access and mobile management function to ps domain entity determine that user equipment when the side 3GPP is in Idle state, is accessed by 3GPP Net restores instruction according to first and sends paging message to user equipment, carries connection in the paging message and restores instruction, the connection Restore instruction and is used to indicate the connection that user equipment restores PDU session.

Based on the third aspect, in one possible implementation, second message is used to indicate user equipment and passes through N3GPP Access the connection of network recovery PDU session.

When second message, which is used to indicate user equipment, accesses the connection of network recovery PDU session by N3GPP, access and shifting Mobility management functional entity can access the connection of the network recovery PDU session by second message notifying user equipment by N3GPP. User equipment can be accessed net by N3GPP and initiate to restore the PDU session after accessing net by 3GPP and receiving second message Service request.

Based on the third aspect, in one possible implementation, meeting is received in access and mobile management function to ps domain entity After the first message that words management function entity is sent, before sending second message to user equipment, access and mobile management Functional entity is by the context bindings of PDU session to the side 3GPP；Wherein, second message is used to indicate user equipment by PDU meeting After words shift to the side 3GPP from N3GPP lateral incision, pass through the connection that 3GPP accesses network recovery PDU session.

In addition, before access and mobile management function to ps domain entity are by the context bindings of PDU session to the side 3GPP, access It can get network strategy with mobile management function to ps domain entity, which is used to indicate PDU session and can change from N3GPP lateral incision To the side 3GPP.

The concrete mode that access and mobile management function to ps domain entity obtain network strategy may is that access and mobile management Functional entity is in PDU session establishment from UDM (Unified Data Management, normalization data management) or PCF (Policy Control Function, policy control functions entity) obtains network strategy；Or it accesses and mobile management function Energy entity obtains network strategy from UDM or PCF when receiving first message.

Access and mobile management function to ps domain entity are used to indicate user equipment to the second message that user equipment is sent and are inciting somebody to action After the PDU session shifts to the side 3GPP from N3GPP lateral incision, pass through the connection that 3GPP accesses the network recovery PDU session.So, user Equipment can access net by 3GPP and initiate service request, request after receiving second message according to the instruction of second message Reply the connection for the PDU session that the side N3GPP is established.

Fourth aspect, the embodiment of the present application provide a kind of connection restoration methods, this method comprises: when user equipment exists When the side N3GPP is in Idle state, user equipment accesses net by 3GPP and receives what access was sent with mobile management function to ps domain entity Second message, the second message are used to indicate the connection for restoring the PDU session that the side N3GPP is established；User equipment, which initiates service, asks It asks, which is used for the connection for requesting to restore PDU session.

Based on fourth aspect, in one possible implementation, user equipment by 3GPP access net receive access and The second message that mobile management function to ps domain entity is sent, can specifically be accomplished in that

The first

When user equipment is when the side 3GPP is in connected state, user equipment accesses net by 3GPP and receives access and mobility The notification message that management function entity is sent carries connection in the notification message and restores instruction, which restores instruction for referring to Show that user equipment restores the connection of PDU session.

Second

When user equipment is when the side 3GPP is in Idle state, user equipment accesses net by 3GPP and receives access and mobility The paging message that management function entity is sent carries connection in the paging message and restores instruction, which restores instruction for referring to Show that user equipment restores the connection of PDU session.

Wherein, connection restore instruction include one or more of: the session identification of the PDU session, the PDU session nothing Line access style, the PDU session connect network identification.If connection restores in instruction to include PDU session identification, then user equipment When initiating service request, the PDU session identification can be carried in the service request.

Based on fourth aspect, in one possible implementation, pass through when second message is used to indicate user equipment When N3GPP accesses the connection of network recovery PDU session, user equipment accesses net by N3GPP and initiates service request.

Based on fourth aspect, in one possible implementation, before user equipment initiates service request, Yong Hushe The standby context for restoring instruction and itself storage according to connection determines that accessing net by N3GPP initiates service request；So, User equipment can access net by N3GPP and initiate service request when initiating service request.

For example, the connection that the second message that access and mobile management function to ps domain entity are sent to user equipment carries refers to Show context only comprising the PDU session.So, user equipment, can be according to the PDU session identification when receiving second message The context for inquiring itself storage knows that the PDU session is established in the side N3GPP, then in the connection for restoring the PDU session When, user equipment accesses net by N3GPP and initiates service request.

Based on fourth aspect, in one possible implementation, if second message indicates user equipment by PDU session After the side 3GPP is shifted to from N3GPP lateral incision, the connection of network recovery PDU session is accessed by 3GPP, then user equipment is initiating to take Before business request, first by the context bindings of the PDU session to the side 3GPP；Then net is accessed by 3GPP and initiates service request.

Based on fourth aspect, in one possible implementation, user equipment is accessing net reception access by 3GPP After the second message sent with mobile management function to ps domain entity, before initiating service request, storage strategy can be obtained, the storage Strategy is used to indicate user equipment and docks the selection strategy to network when initiating service request.Then, user equipment can initiate to take Business request.User equipment, which initiates service request, specifically following two implementation:

The first

User equipment accesses net by N3GPP and initiates service request according to the instruction of storage strategy.

Second

User equipment by the context bindings of PDU session to the side 3GPP, and is connect according to the instruction of storage strategy by 3GPP It networks and initiates service request.

Specifically, user equipment can obtain storage strategy by user configuration, can also pass through access and mobile management function It can entity acquisition storage strategy.

5th aspect, the application provide a kind of access and mobile management function to ps domain entity, comprising: receiver, transmitter, place Manage device and memory.

Receiver, for receiving the first message of conversation management functional entity transmission, first message carries first and refers to Show, is used to indicate the connection for restoring the PDU session that user equipment is established in the side N3GPP；Processor, for by executing memory The program of middle storage performs the following operations: when user equipment is when the side N3GPP is in Idle state, storage first restores instruction；It connects Device is received, is also used to access net by N3GPP and receives the second message that user equipment is sent, second message is periodic registration request Or first service request；Transmitter restores instruction to user equipment transmission third according to first for accessing net by N3GPP Message carries connection in third message and restores the connection that instruction notifying user equipment restores the PDU session.Wherein, first restores Instruction may include the session identification of the PDU session.It may include one or more of that connection, which restores instruction: the session mark of the PDU Knowledge, the wireless access type of the PDU session, the PDU session connect network identification.

Alternatively,

Receiver, for receiving the first message of conversation management functional entity transmission, first message carries first and refers to Show, is used to indicate the connection for the PDU session that user equipment is established in the side N3GPP；Transmitter is also used to exist when user equipment When the side N3GPP is in Idle state, the 4th message is sent to conversation management functional entity, the 4th message is used to indicate user equipment not It is reachable.

Based on the 5th aspect, in one possible implementation, processor is also used to store by executing in memory Program perform the following operations: after the first message that receiver receives that conversation management functional entity is sent, it is slow to obtain data Deposit timer；Transmitter according to first by N3GPP access net when restoring to indicate to send third message to user equipment, specifically For: when data buffering timer has not timed out, net is accessed by N3GPP restores instruction according to first and send the to user equipment Three message.

Based on the 5th aspect, in one possible implementation, processor is also used to store by executing in memory Program perform the following operations: transmitter to conversation management functional entity send the 4th message before, sent out according to user equipment The time for playing periodic registration request next time judges whether to send the 4th message.

6th aspect, the embodiment of the present application provide a kind of user equipment, comprising: transmitters and receivers.Transmitter is used for Net is accessed by N3GPP and sends second message to access and mobile management function to ps domain entity, and second message is asked for periodic registration It asks or first service request；Receiver, for being accessed by N3GPP, net receives access and mobile management function to ps domain entity is sent Third message, connection is carried in third message and restores instruction；Transmitter is also used to access net by N3GPP and initiates the second clothes Business request, for requesting the connection of the recovery PDU session, which is that user equipment is built in the side N3GPP for second service request Vertical.

7th aspect, the embodiment of the present application provide a kind of access and mobile management function to ps domain entity, including receiver and hair Send device.Receiver, for receiving the first message of conversation management functional entity transmission, first message carries first and restores instruction, It is used to indicate the connection for restoring the PDU session that user equipment is established in the side N3GPP；Transmitter, for when user equipment is in N3GPP When side is in Idle state, net is accessed by 3GPP and restores instruction to user equipment transmission second message, second message according to first It is used to indicate the connection that user equipment restores the PDU session.

Wherein, first restores the session identification that instruction may include PDU session.

Based on the 7th aspect, in one possible implementation, transmitter is extensive according to first by 3GPP access net It indicates to send second message to user equipment again, second message is used to indicate user equipment when restoring the connection of the PDU session, tool Body is used for:

When determine user equipment when the side 3GPP is in connected state, by 3GPP access net according to first restore instruction to Family equipment dispatch order message carries connection in notification message and restores instruction, and connection restores instruction, and to be used to indicate user equipment extensive The connection of the multiple PDU session；Alternatively, when determine user equipment when the side 3GPP is in Idle state, by 3GPP access net according to First, which restores instruction, sends paging message to user equipment, and connection is carried in paging message and restores instruction, connection restores instruction and uses Restore the connection of the PDU session in instruction user equipment.

Based on the 7th aspect, in one possible implementation, second message is used to indicate user equipment and passes through N3GPP Access the connection of the network recovery PDU session.

Based on the 7th aspect, in one possible implementation, the access and mobile management function to ps domain entity further include Processor.Processor, for being performed the following operations by executing the program stored in memory: receiving session management in receiver Functional entity send first message after, transmitter to user equipment send second message before, by the PDU session up and down Text is tied to the side 3GPP；Wherein, second message is used to indicate user equipment and the PDU session is being shifted to 3GPP from N3GPP lateral incision Behind side, the connection of the network recovery PDU session is accessed by 3GPP.

Based on the 7th aspect, in one possible implementation, processor is also used to store by executing in memory Program perform the following operations: before by the context bindings of the PDU session to the side 3GPP, obtain network strategy, network plan The side 3GPP can be shifted to from N3GPP lateral incision by being slightly used to indicate the PDU session.

Based on the 7th aspect, in one possible implementation, processor is specifically used for when obtaining network strategy:

Network strategy is obtained from UDM or PCF in the PDU session establishment；Alternatively, when receiving first message from UDM Or PCF obtains network strategy.

Eighth aspect, the embodiment of the present application provide a kind of user equipment, including receiver and transmitter.Receiver is used for When user equipment is when the side N3GPP is in Idle state, passes through 3GPP access net and receive access and mobile management function to ps domain entity hair The second message sent, second message are used to indicate the connection for restoring the PDU session that user equipment is established in the side N3GPP；Transmitter, For initiating service request, service request is used for the connection for requesting to restore the PDU session.

Based on eighth aspect, in one possible implementation, receiver by 3GPP access net receive access and When the second message that mobile management function to ps domain entity is sent, it is specifically used for: logical when user equipment is when the side 3GPP be in connected state The notification message that 3GPP access net receives access and mobile management function to ps domain entity is sent is crossed, connection is carried in notification message and restores Instruction, connection restore instruction and are used to indicate the connection that user equipment restores the PDU session；Alternatively, when user equipment is in the side 3GPP When in Idle state, the paging message that net receives access and mobile management function to ps domain entity is sent is accessed by 3GPP, paging disappears Connection is carried in breath and restores instruction, and connection restores instruction and is used to indicate the connection that user equipment restores the PDU session.

It includes one or more of that connection, which restores instruction: the session identification of the PDU session, the wireless of the PDU session connect Enter type, the PDU session connects network identification.When connection restores to carry the session identification of the PDU session in instruction, service is asked The session identification of the PDU session can be carried in asking.

Based on eighth aspect, in one possible implementation, transmitter is specifically used for when initiating service request: Net, which is accessed, by N3GPP initiates service request；Wherein, second message is used to indicate user equipment and accesses network recovery by N3GPP The connection of the PDU session.

Based on eighth aspect, in one possible implementation, user equipment further includes processor, and processor is for leading to It crosses the program for executing and storing in memory to perform the following operations: before transmitter initiates service request, be referred to according to connection Show and the context of itself storage, determining accessed by N3GPP net initiation service request；Transmitter is initiating service request When, it is specifically used for: net is accessed by N3GPP and initiates service request.

Based on eighth aspect, in one possible implementation, processor is also used to store by executing in memory Program perform the following operations: transmitter initiate service request before, by the context bindings of the PDU session to the side 3GPP； Transmitter is specifically used for when initiating service request: accessing net by 3GPP and initiates service request.Wherein, second message is used for Instruction user equipment passes through 3GPP and accesses the network recovery PDU session after the PDU session is shifted to the side 3GPP from N3GPP lateral incision Connection.

Based on eighth aspect, in one possible implementation, processor is also used to store by executing in memory Program perform the following operations: access by 3GPP that net receives access and mobile management function to ps domain entity is sent the in receiver After two message, before transmitter initiation service request, storage strategy is obtained, storage strategy is used to indicate user equipment and is initiating The selection strategy that docking networks when service request；Transmitter is specifically used for when initiating service request: according to the finger of storage strategy Show, net is accessed by N3GPP and initiates service request；Or the instruction according to storage strategy, by the context bindings of the PDU session To the side 3GPP, and net is accessed by 3GPP and initiates service request.

Based on eighth aspect, in one possible implementation, processor is specifically used for when obtaining storage strategy: Storage strategy is obtained by user configuration；Or storage strategy is obtained by access and mobile management function to ps domain entity.

9th aspect, the embodiment of the present application provide it is a kind of access and mobile management function to ps domain entity, can be and the 5th The access and the identical functional entity of mobile management function to ps domain entity that aspect provides.The access and mobile management function to ps domain entity packet Containing communication unit, processing unit, storage unit.Processing unit is for executing access and mobile management function in above-mentioned first aspect The processing operation of energy entity；Communication unit is used to execute the transmitting-receiving accessed in above-mentioned first aspect with mobile management function to ps domain entity Operation；Storage unit is used to store the program code and data of access and mobile management function to ps domain entity.

Tenth aspect, the embodiment of the present application provide a kind of user equipment, can be the user provided with the 6th aspect and set Standby identical equipment.The user equipment includes communication unit, processing unit, storage unit.Processing unit is for executing above-mentioned the The processing operation of user equipment in two aspects；Communication unit is used to execute the transmitting-receiving operation of user equipment in above-mentioned second aspect； Storage unit is used to store the program code and data of user equipment.

Tenth on the one hand, and the embodiment of the present application provides a kind of access and mobile management function to ps domain entity, can be and the The access and the identical functional entity of mobile management function to ps domain entity that seven aspects provide.The access and mobile management function to ps domain entity Include communication unit, processing unit, storage unit.Processing unit is for executing access and mobile management in the above-mentioned third aspect The processing operation of functional entity；Communication unit is used to execute the receipts accessed in the above-mentioned third aspect with mobile management function to ps domain entity Hair operation；Storage unit is used to store the program code and data of access and mobile management function to ps domain entity.

12nd aspect, the embodiment of the present application provide a kind of user equipment, can be the user provided with eighth aspect The identical equipment of equipment.The user equipment includes communication unit, processing unit, storage unit.Processing unit is above-mentioned for executing The processing operation of user equipment in fourth aspect；Communication unit is used to execute the transmitting-receiving behaviour of user equipment in above-mentioned fourth aspect Make；Storage unit is used to store the program code and data of user equipment.

13rd aspect, provides a kind of computer readable storage medium, the computer-readable recording medium storage For for computer software instructions used in above-mentioned access and mobile management function to ps domain entity.Said program code includes for holding The instruction of the method for any of the above-described aspect description of row.

Fourteenth aspect provides a kind of computer readable storage medium, the computer-readable recording medium storage For for computer software instructions used in above-mentioned user equipment.Said program code includes retouching for executing any of the above-described aspect The instruction for the method stated.

15th aspect, present invention also provides a kind of computer program product comprising instruction, when its on computers When operation, so that computer executes method described in above-mentioned various aspects.

16th aspect, present invention also provides a kind of systems, including above-mentioned access and mobile management function to ps domain entity With conversation management functional entity.In one possible implementation, which can also include user plane functions entity.One In the possible implementation of kind, which can also include user equipment etc..

Detailed description of the invention

Fig. 1 is a kind of schematic diagram of the network architecture of 5G provided by the embodiments of the present application；

Fig. 2 is the flow diagram of the first connection restoration methods provided by the embodiments of the present application；

Fig. 3 is the flow diagram of second provided by the embodiments of the present application connection restoration methods；

Fig. 4 is the flow diagram of the third connection restoration methods provided by the embodiments of the present application；

Fig. 5 is the flow diagram of 4th kind provided by the embodiments of the present application connection restoration methods；

Fig. 6 is the flow diagram of 5th kind provided by the embodiments of the present application connection restoration methods；

Fig. 7 is the flow diagram of 6th kind provided by the embodiments of the present application connection restoration methods；

Fig. 8 is the flow diagram of 7th kind provided by the embodiments of the present application connection restoration methods；

Fig. 9 is the flow diagram of 8th kind provided by the embodiments of the present application connection restoration methods；

Figure 10 is the flow diagram of 9th kind provided by the embodiments of the present application connection restoration methods；

Figure 11 is the structural schematic diagram of the first access and mobile management function to ps domain entity provided by the embodiments of the present application；

Figure 12 is the structural schematic diagram of second provided by the embodiments of the present application access and mobile management function to ps domain entity；

Figure 13 is the structural schematic diagram of the first user equipment provided by the embodiments of the present application；

Figure 14 is the structural schematic diagram of second of user equipment provided by the embodiments of the present application；

Figure 15 is the structural schematic diagram of the third access and mobile management function to ps domain entity provided by the embodiments of the present application；

Figure 16 is the structural schematic diagram of 4th kind provided by the embodiments of the present application access and mobile management function to ps domain entity；

Figure 17 is the structural schematic diagram of the third user equipment provided by the embodiments of the present application；

Figure 18 is the structural schematic diagram of the 4th kind of user equipment provided by the embodiments of the present application.

Specific embodiment

In order to cope with the challenge of wireless broad band technology, the leading superiority of 3GPP network is kept, 3GPP standard group was in 2016 The next generation mobile communication network architecture (Next Generation System), referred to as the 5G network architecture are formulated in bottom.The framework Wireless technology access 5G core net (5G Core network) for not only 3GPP standard group being supported to define, and N3GPP is supported to connect Enter technology access 5G core net, such as by N3GPP conversion function entity (N3GPP Interworking Function, N3IWF), Next Generation Access closes (next Generation packet data Gateway, ngPDG), N3GPP accesses net Equipment or N3GPP access gateway etc. access 5G core net.The 5G network architecture can be as shown in Figure 1.In Fig. 1, core net is divided into use Family face functional entity (User Plane Function, UPF), access and mobile management function to ps domain entity (Core Access And Mobility Management Function, AMF) and conversation management functional entity (Session Management Function, SMF).Wherein, AMF and SMF composition control face functional entity (Control Plane Function, CPF).UPF It is mainly responsible for the forwarding, service quality (Quality of Service, QoS) control, charge information statistics etc. of packet data package. CPF is mainly responsible for user's registration certification, mobile management and issues data packet forwarding strategy, QoS control strategy etc. to UPF.Tool Body, AMF is responsible for the location management in the register flow path and user's moving process when user accesses, and SMF is responsible for user and initiates industry Network side establishes corresponding session connection when business, provides specific service for user, and the NG4 being based especially between SMF and UPF connects Mouth issues data packet forwarding strategy, qos policy etc. to UPF.

It should be noted that the N3IWF in Fig. 1 is one kind of N3GPP access gateway, net is accessed to N3GPP in the application With no restrictions, title can be N3IWF to the title of pass, be also possible to ngPDG or N3GPP access network equipment, N3GPP access net Close etc..

It should be noted that in the embodiment of the present application, control plane functional entity, user plane functions entity, access and movement Property management function entity and conversation management functional entity etc. are only a names, and name does not constitute restriction to equipment itself.Not In the 5G network and following other networks come, control plane functional entity, user plane functions entity, access and mobile management Network element corresponding to functional entity and conversation management functional entity or entity are also possible to other names, the embodiment of the present application pair This is not especially limited.For example, the control plane functional entity is it is also possible to be replaced by control plane function or CP, the user face Functional entity is described collectively, is repeated no more below herein it is also possible to be replaced by user plane functions or UP, etc..

Also need explanation, above-mentioned control plane functional entity, user plane functions entity, access and mobile management function Energy entity and conversation management functional entity etc. are in addition to having the function in the embodiment of the present application, it is also possible to have other functions, The embodiment of the present application is not especially limited this.In addition, control plane functional entity, user plane functions entity, access and mobility Management function entity and conversation management functional entity etc. may be realized by an entity device, it is also possible to by multiple entity devices Common to realize, the embodiment of the present application is not especially limited this.I.e., it is possible to understand, the control plane in the embodiment of the present application Functional entity, user plane functions entity, access and mobile management function to ps domain entity and conversation management functional entity etc. all may be A logic functional block in entity device, it is also possible to a logic functional block being made of multiple entity devices, this Application embodiment is not especially limited this.

When user equipment accesses net access 5G core net by N3GPP, if being received in the PDU session that the side N3GPP is established To when being handed down to the downlink data for being in the user equipment of Idle state, how to be used due to not being provided in existing 5G network Family equipment is converted to the scheme of connected state from Idle state, therefore user equipment can not be paged, so as to cause downlink data transmission Failure.

The embodiment of the present application provides a kind of connection restoration methods, control plane functional entity and user equipment, in user For equipment by N3GPP access net access 5G core net and when user equipment is in Idle state, providing one kind makes user equipment from sky Not busy state is converted to the connection recovery scheme of connected state, guarantees downlink data energy Successful transmissions.

Two embodiments will be passed through respectively below, connection restoration methods provided by the present application are described in detail.

Embodiment one

As shown in Fig. 2, being a kind of connection restoration methods provided by the embodiments of the present application.This method comprises the following steps:

S201: access and mobile management function to ps domain entity receive the first message that conversation management functional entity is sent.

Wherein, first is carried in first message and restore instruction, be used to indicate and restore what user equipment was established in the side N3GPP The connection of PDU session, the user equipment are in Idle state in the side N3GPP.Wherein, first restores to indicate to can be the PDU session Session identification (hereinafter referred to as PDU session identification).

It should be noted that the PDU session is that user equipment is established before the side N3GPP is converted to Idle state by connected state PDU session.

In the application, the lower line number of user equipment is handed down to when user plane functions entity receives in above-mentioned PDU session According to when, disconnected since the user face of the PDU session connects, downlink data can not be handed down to user and set by user plane functions entity It is standby.At this point, user plane functions entity can send downlink data notification (Downlink Data to conversation management functional entity Notification, DDN) message, conversation management functional entity after receiving DDN message, can by access and mobility Management function entity sends first message to indicate that user equipment restores the connection of the PDU session.

S202: access and mobile management function to ps domain entity storage first restore instruction.

Wherein, the connection for restoring the PDU session establishes or activates the user face of the PDU session to connect.

S203: user equipment accesses net by N3GPP and sends second message to access and mobile management function to ps domain entity.

Wherein, second message is periodic registration request or first service request.

It should be noted that when user equipment has already registered with core net and is in Idle state, if user equipment needs Restore the connection (when such as user equipment periodical timer time-out) with core net, user equipment, which can initiate registration, asks It asks, and sets periodic registration for registration type.

When user equipment needs to send upstream data in other PDU sessions in addition to above-mentioned PDU session, user equipment Transmittable first service request.

In addition, user equipment can also initiate the when user equipment needs to send upstream data in above-mentioned PDU session One service request.In this case, user equipment can the spontaneous recovery PDU session connection, at this point, access and mobility pipe Reason functional entity will be deleted the connection stored in S202 and restore instruction, and following step S204~S205 no longer needs to execute.

S204: access and mobile management function to ps domain entity access net by N3GPP and restore to indicate to set to user according to first Preparation send third message.

Wherein, connection is carried in third message restore instruction.When second message is periodic registration request message, third Message is periodic registration response message；When second message is the service request information of the 2nd PDU session, third message is the The service request response message of two PDU sessions.

Connection restore instruction include one or more of: the PDU session identification, the PDU session wireless access type, The PDU session connects network identification.

It should be noted that first, which restores instruction, carries in first message, and first restores in method shown in Fig. 2 Instruction can be PDU session identification；Connection restores instruction and carries in third message, and connection, which restores instruction, can be PDU session Mark, the wireless access type of above-mentioned PDU session and above-mentioned PDU session connect one or more of network identification.Namely It says, after access and mobile management function to ps domain entity are stored with the first recovery instruction, and accessing can with mobile management function to ps domain entity Analysis obtains the wireless access type of the PDU session or connects network identification, or sent by receiving conversation management functional entity Message know the wireless access type of the PDU session or connect network identification.Access and mobile management function to ps domain entity to It is optional by PDU session identification, the wireless access type of above-mentioned PDU session and above-mentioned PDU meeting when user equipment sends third message One or more of the network identification that connects of words carries in third message, to indicate that user equipment restores above-mentioned PDU session Connection.

In the application, access and mobile management function to ps domain entity can obtain data buffer storage timing after receiving first message Device, the data buffer storage timer are sent to access and mobile management function to ps domain entity after being formulated by conversation management functional entity, It can also be formulated by access and mobile management function to ps domain entity, or be pre-configured in access and mobile management function to ps domain physically etc. Etc. modes.

If the data buffer storage timer has timed out, then access and mobile management function to ps domain entity restore instruction for first and delete Remove, when access and mobile management function to ps domain entity receive second message when, and access and mobile management function to ps domain entity to Restore instruction without carrying above-mentioned connection in the third message that user equipment is sent；If access and mobile management function to ps domain entity connect When receiving second message, which is had not timed out, then access and mobile management function to ps domain entity are to user equipment Connection is carried in the third message of transmission and restores instruction, to indicate that user equipment initiates to restore the second service of the PDU session Request, to receive the downlink data issued.

S205: user equipment accesses net by N3GPP and initiates second service request.

Wherein, second service request is used to request to restore the connection of above-mentioned PDU session.User equipment is connect by N3GPP It networks after initiating second service request, user equipment can be converted to connected state from Idle state, to receive the lower line number issued According to.

For example, the connection carried in third message restores the wireless access class that instruction includes PDU session identification and PDU session Type, user equipment restore the wireless access type for the PDU session for including in instruction receiving connection, and user equipment passes through N3GPP access net initiates second service request.

For example, the connection carried in third message restores the access network mark that instruction includes PDU session identification and PDU session Know.The PDU session that user equipment includes in receiving connection recovery instruction connects network identification, the access net of the PDU session Net is accessed for N3GPP, user equipment accesses net by N3GPP and initiates second service request.

For another example, the connection carried in third message restores instruction and includes PDU session identification, and user equipment is in the company of receiving After connecing the PDU session identification for restoring to include in instruction, user equipment can access net by N3GPP after receiving third message Initiate second service request.

In addition, access and mobile management function to ps domain entity can also connect when user equipment is when the side N3GPP is in Idle state After receiving the first message that conversation management functional entity is sent, the 4th message is sent to conversation management functional entity, to by being somebody's turn to do 4th message indicates that user equipment is unreachable.So, conversation management functional entity can notify to use after receiving the 4th message Family face functional entity abandons the downlink data for being handed down to the user equipment.

Specifically, before access and mobile management function to ps domain entity send the 4th message to conversation management functional entity, The time that access and mobile management function to ps domain entity can initiate periodic registration request next time according to user equipment judges whether Send above-mentioned 4th message.This is because: connection restoration methods shown in Fig. 2 rely on the periodic registration of user equipment initiation Request or first service request, wherein the sending time and transmission frequency of periodic registration request message are access and movement Property management function entity it is predictable, the sending time of first service request be access and mobile management function to ps domain entity can not be pre- Know.Only consider predictable periodic registration request process, if user equipment initiate next time periodic registration request when Between apart from current time overlong time, then user plane functions entity will cache always the lower line number for being handed down to user equipment According to this can undoubtedly occupy overhead, influence the treatment effeciency of user plane functions entity.At this point, access and mobile management function The time that energy entity can initiate periodic registration request next time according to user equipment be judged, if under user equipment is initiated The overlong time at the time gap current time of periodic registration request, access and mobile management function to ps domain entity are then to meeting It talks about management function entity and sends the 4th message, conversation management functional entity notifies user face function after receiving the 4th message The downlink data that energy entity will be handed down to the user equipment abandons, to reduce the overhead of user plane functions entity, is promoted The treatment effeciency of user plane functions entity.

In connection restoration methods shown in Fig. 2, when user equipment is in Idle state, access and mobile management function to ps domain For entity after the first message for receiving the transmission of conversation management functional entity, storage first restores instruction, and sends out in user equipment After playing periodic registration request or first service request, restores instruction according to described first and send third to the user equipment Message, and carry connection in third message and restore instruction, to indicate that user equipment restores user equipment and establishes in the side N3GPP PDU session connection.Therefore, it using connection restoration methods shown in Fig. 2, can only be accessed by N3GPP in user equipment Net core network access and when user equipment is in Idle state, providing a kind of makes user equipment be converted to connected state from Idle state Recovery scheme is connected, so that user equipment restores the connection of above-mentioned PDU session.

Based on connection restoration methods shown in Fig. 2, the embodiment of the present application also provides a kind of connection restoration methods, and this method is such as Shown in Fig. 3.Connection restoration methods shown in Fig. 3 can be considered a specific example of connection restoration methods shown in Fig. 2, Fig. 3 institute Show that the implementation for not explaining in detail and describing in method can refer to the associated description in method shown in Fig. 2.As shown in figure 3, should Method comprises the following steps:

1, UPF receives the downlink data for being handed down to user equipment in the PDU session that the side N3GPP is established.

2a, UPF send downlink data notification message to SMF.

Wherein, downlink data notification message, which is used to indicate UPF and receives in the PDU session that the side N3GPP is established, is handed down to The downlink data of UE carries the PDU session identification in downlink data notification message, which is in Idle state in the side N3GPP.

2b, SMF send downlink data notification message acknowledgment message to UPF after receiving downlink data notification message, use To indicate that SMF has been received by the downlink data notification message of UPF transmission.

3a, SMF send N11 message to AMF.

N11 message can be considered an example of the first message in method shown in Fig. 2, carry the PDU session in N11 message Mark.

3b, AMF send N11 message acknowledgment message to SMF, and the N11 message of SMF transmission is had been received by indicate AMF.

4, AMF stores the PDU session identification.

In connection restoration methods shown in Fig. 3, data buffer storage timer can be formulated by AMF, can also be formulated by SMF.When When AMF formulates data buffer storage timer, in the N11 message acknowledgment message that AMF sends data buffer storage timer in step 3b It is sent to SMF, and the data buffer storage timer is sent to UPF by SMF；When SMF formulates data buffer storage timer, SMF will It is sent to UPF in the downlink data notification message acknowledgment message that data buffer storage timer is sent in step 2b, and by the number AMF is sent to according to caching timer.

5, UE initiates periodic registration request or first service request by N3IWF.

Wherein, UE initiates periodic registration request by N3IWF or first service request, i.e. UE access net by N3GPP Initiate periodic registration request or first service request.

First service request message is that user equipment needs to send upper line number in some PDU session that the side N3GPP is established According to when be sent to access and mobile management function to ps domain entity.

6, when data buffer storage timer has not timed out, AMF sends response message to UE by N3IWF, in the response message It carries connection and restores instruction.

It may include following one or more that connection, which restores instruction: the PDU session identification, the PDU session wireless access class Type and the PDU session connect network identification.

Wherein, which can be considered an example of the third message in method shown in Fig. 2, which is used for Respond the service request of periodic registration request or the 2nd PDU session of user equipment.

Wherein, AMF sends response message to UE by N3IWF, i.e. AMF accesses net and send to respond to UE by N3GPP to disappear Breath.

7, UE passes through N3IWF and initiates second after response message receiving AMF transmission, indicating comprising connection recovery Service request establishes or activates the user face of the PDU session to connect, to receive the downlink data for being handed down to UE.

Wherein, UE initiates second service request by N3IWF, i.e. UE accesses net initiation second service by N3GPP and requests.

Embodiment two

As shown in figure 4, being a kind of connection restoration methods provided by the embodiments of the present application.This method comprises the following steps:

S401: access and mobile management function to ps domain entity receive the first message that conversation management functional entity is sent.

Wherein, first message carries first and restores to indicate, is used to indicate and restores the PDU that user equipment is established in the side N3GPP The connection of session.The first recovery instruction can be the session identification (hereinafter referred to as PDU session identification) of the PDU session.

S402: access and mobile management function to ps domain entity access net by 3GPP and restore instruction to user equipment according to first Send second message.

Wherein, which is in Idle state in the side N3GPP, which is used to indicate user equipment and restores above-mentioned The connection of PDU session.

Wherein, the connection for restoring above-mentioned PDU session establishes or activates the user face of the PDU session to connect.

When control plane functional entity restores to indicate to send second message to user equipment by 3GPP access net according to first, It can specifically be accomplished in that access and mobile management function to ps domain entity determine that user equipment is in connected state in the side 3GPP When, access and mobile management function to ps domain entity access net by 3GPP and restore to indicate that sending notice to user equipment disappears according to first It ceases, connection is carried in the notification message and restores instruction, connection recovery instruction is used to indicate user equipment and restores above-mentioned PDU session Connection；Alternatively, access and mobile management function to ps domain entity determine user equipment when the side 3GPP is in Idle state, accesses and move Mobility management functional entity accesses net by 3GPP and restores instruction to user equipment transmission paging message, paging message according to first Middle carrying connection restores instruction, and connection restores instruction and is used to indicate the connection that user equipment restores above-mentioned PDU session.

When user equipment is when the side 3GPP is in connected state, control plane functional entity can be restored connection by notification message Instruction is sent to user equipment；When user equipment is when the side 3GPP is in Idle state, access and mobile management function to ps domain entity are difficult Directly to send a notification message to user equipment, thus accesses and need the shape by paging message with mobile management function to ps domain entity Connection is restored instruction and is sent to user equipment by formula.

Wherein, connection restore instruction may include one or more of: the PDU session identification, the PDU session it is wireless Access style (Radio Access Technology type, RAT type), the PDU session connect network identification.

It should be noted that first, which restores instruction, carries in first message, and first restores in method shown in Fig. 4 Instruction can be the PDU session identification；Connection restores instruction and carries in second message, and connection, which restores instruction, can be the PDU Session identification, the wireless access type of the PDU session and the PDU session connect one or more of network identification.Also To say, access and mobile management function to ps domain entity to user equipment send second message when, it is optional by the PDU session identification, The wireless access type of the PDU session and one or more of the network identification that connects of the PDU session carry in second message, To indicate that user equipment restores the connection of the PDU session.User equipment can restore content, the basis that instruction includes according to connection Access and the instruction of mobile management function to ps domain entity or according to itself storage strategy and the context stored according to itself Equal various ways determine that the connection for accessing the network recovery PDU session by N3GPP still accesses the network recovery PDU by 3GPP The connection of session.

S403: user equipment initiates service request, which is used to request to restore the connection of above-mentioned PDU session.

In connection restoration methods shown in Fig. 4, when user equipment is in Idle state, access and mobile management function to ps domain Entity is accessed after receiving first message that conversation management functional entity issues, carrying the first recovery instruction by 3GPP Net restores instruction according to first and sends second message to user equipment, indicates that user equipment restores above-mentioned by second message The connection for the PDU session that the side N3GPP is established.User equipment, can be according to the instruction of second message after receiving second message Service request is initiated, to restore the connection for the PDU session that the above-mentioned side N3GPP is established.In method shown in Fig. 4, due to user Equipment by 3GPP access net core network access, then access and mobile management function to ps domain entity by 3GPP access net to Family equipment sends second message, to indicate that user equipment restores the connection for the PDU session that the above-mentioned side N3GPP is established.Using Fig. 4 Shown method can access net by 3GPP respectively in user equipment and N3GPP accesses net core network access and user equipment When the side N3GPP is in Idle state, it is extensive to provide a kind of connection for making user equipment be converted to connected state from Idle state in the side N3GPP Compound case guarantees the downlink data energy of the side N3GPP so that user equipment restores the connection for the PDU session that the above-mentioned side N3GPP is established Successful transmissions.

In the second message that access and mobile management function to ps domain entity are sent to user equipment, access and mobile management Functional entity can indicate that user equipment, can also be with by the connection of the N3GPP access above-mentioned PDU session of network recovery by second message Indicate that user equipment accesses the connection of the above-mentioned PDU session of network recovery, or access and mobile management function to ps domain entity by 3GPP It does not indicate which user equipment access the connection of the above-mentioned PDU session of network recovery by second message, but is set by user The connection which access above-mentioned PDU session of network recovery standby judgement passes through.Therefore, under above-mentioned three kinds of scenes, embodiment two can be with There are following three kinds of implementations: embodiment A, embodiment B and embodiment C.

Embodiment A

As shown in figure 5, being a kind of connection restoration methods provided by the present application.Method shown in Fig. 5 can be considered method shown in Fig. 4 A kind of implementation.Method shown in Fig. 5 comprises the following steps:

S501: access and mobile management function to ps domain entity receive the first message that conversation management functional entity is sent.

Wherein, first message carries first and restores to indicate, is used to indicate and restores the PDU that user equipment is established in the side N3GPP The connection of session.It specifically can refer to the S401 step in method shown in Fig. 4.

It should be noted that the PDU session is that user equipment is established before the side N3GPP is converted to Idle state by connected state PDU session.First, which restores instruction, can be the PDU session identification.

S502: access and mobile management function to ps domain entity access net by 3GPP and send second message to user equipment.

Wherein, which is in Idle state in the side N3GPP, and wirelessly connecing for the PDU session can be carried in second message Enter type, the PDU session connects one of network identification and the PDU session identification or a variety of.

S503: user equipment accesses net by N3GPP and initiates service request, and request restores the connection of the PDU session.

As previously mentioned, connection can be carried in the second message that access and mobile management function to ps domain entity are sent to user equipment Restore instruction, is used to indicate the connection that the user equipment restores the PDU session.Connection, which restores instruction, may include with next Kind or it is a variety of: PDU session identification, the wireless access type of PDU session or PDU session connect network identification.

The wireless access type of the PDU session and/or the access network mark of the PDU session are carried in S502, in second message Know, optional carrying PDU session identification.

If the connection carried in second message restores wireless access type or the PDU in instruction comprising the PDU session Session connects network identification, then can indicate that the second message that access and mobile management function to ps domain entity are sent to user equipment is used The connection of the above-mentioned PDU session of network recovery is accessed by N3GPP in instruction user equipment.

For example, connection restores the wireless access type that instruction includes PDU session identification and PDU session, then user equipment After the wireless access type for the PDU session for including in receiving connection recovery instruction, it would know that PDU session needs pass through N3GPP accesses network recovery, and user equipment is to access net by N3GPP to initiate to restore the service request of the PDU session.

For another example, connection restores instruction and connects network identification comprising PDU session identification and PDU session, then user equipment Receive connection restore instruction in include PDU session connect network identification after, would know that the PDU session needs pass through N3GPP accesses network recovery, and user equipment accesses the service request that net initiates the recovery PDU session by N3GPP.

But in example 2 also comprising another situation, connection restores to include PDU session identification in instruction, then User equipment need to restore the PDU session identification for including in instruction according to connection and itself store after receiving second message Context determines it is to establish before the PDU session in the side N3GPP, so that it is determined that accessing net initiation recovery by N3GPP should The service request of PDU session.

In addition, if connection restores in instruction to include PDU session identification, then user equipment initiates service request in S503 When, the PDU session identification can be carried in the service request.If not carrying the PDU session identification in service request, will lead to Restore the connection of all PDU sessions of the side N3GPP；If carrying the PDU session identification in service request, it can only restore the PDU The connection of session.

In connection restoration methods shown in Fig. 5, when user equipment is in Idle state, access and mobile management function to ps domain Entity is accessed after receiving the transmission of conversation management functional entity, carrying the first recovery instruction first message by 3GPP Net restores instruction according to first and sends second message to user equipment, and instruction user equipment is above-mentioned by N3GPP access network recovery The connection for the PDU session that the side N3GPP is established.User equipment can access net by N3GPP and initiate after receiving second message Service request, to receive the downlink data of the side N3GPP.It therefore, can be in user using connection restoration methods shown in fig. 5 Equipment accesses net by 3GPP respectively and N3GPP accesses net core network access and user equipment is in Idle state in the side N3GPP When, a kind of connection recovery scheme for making user equipment be converted to connected state from Idle state in the side N3GPP is provided, so that user equipment Restore the connection for the PDU session that the above-mentioned side N3GPP is established, guarantees the downlink data energy Successful transmissions of the side N3GPP.

In addition, method shown in Fig. 5 applies also for following scene: when user equipment respectively by 3GPP access net and N3GPP access net core network access and user equipment be in connected state in the side N3GPP, but the user face of the PDU session connects and do not have When establishing, this method also can be used and realize that access and mobile management function to ps domain entity access Netcom by 3GPP and know that user sets It is standby to restore the connection of the PDU session in the side N3GPP.

Based on connection restoration methods shown in fig. 5, the embodiment of the present application also provides a kind of connection restoration methods, and this method is such as Shown in Fig. 6.Connection restoration methods shown in fig. 6 can be considered a specific example of connection restoration methods shown in fig. 5, Fig. 6 institute Show that the implementation for not explaining in detail and describing in method can refer to the associated description in method shown in Fig. 5.As shown in fig. 6, should Method comprises the following steps:

1, UPF receives the downlink data for being handed down to UE in the PDU session that the side N3GPP is established.

Wherein, UE is in Idle state in the side N3GPP.

2a, UPF send downlink data notification message to SMF.

Wherein, downlink data notification message, which is used to indicate UPF and receives in the PDU session that the side N3GPP is established, is handed down to The downlink data of UE carries the PDU session identification in downlink data notification message.

3a, SMF send N11 message to AMF.

Wherein, N11 message is a specific example of the first message in method shown in Fig. 5, and carrying in N11 message should PDU session identification.

4, AMF sends paging message to RAN (Radio Access Network, wireless access network).

Wherein, paging message carries connection and restores to indicate, connection recovery instruction is used to indicate user equipment and passes through N3GPP Access the connection of the above-mentioned PDU session of network recovery.

5, paging message is transmitted to UE by RAN.

AMF the forwarding of RAN will connection restore instruction be sent to UE process can by notification message by way of realize, It can also be realized by way of paging message.When UE is when the side 3GPP is in Idle state, AMF will be connected extensive by the forwarding of RAN The process that multiple instruction is sent to UE is realized by way of paging message；When UE is when the side 3GPP is in connected state, AMF passes through The forwarding of RAN restores connection to indicate that the process for being sent to UE is realized by way of notification message.It is with paging message in Fig. 6 Example is illustrated.

6, UE after receiving the paging message, restores the instruction of instruction according to the connection carried in paging message, passes through N3IWF initiates to restore the service request of the PDU session.

UE initiates to restore the service request of the PDU session by N3IWF, i.e. UE is restored by N3GPP access net initiation should The service request of PDU session.

7, UPF sends downlink data to user equipment by N3IWF.

Embodiment B

As shown in fig. 7, being a kind of connection restoration methods provided by the present application.Method shown in Fig. 7 can be considered method shown in Fig. 4 A kind of implementation.Method shown in Fig. 7 comprises the following steps:

S701: access and mobile management function to ps domain entity receive the first message that conversation management functional entity is sent.

Wherein, first message carries first and restores to indicate, for referring to the PDU meeting for restoring user equipment and establishing in the side N3GPP The connection of words.First, which restores instruction, can be the PDU session identification.

S702: access and mobile management function to ps domain entity are by the context bindings of above-mentioned PDU session to the side 3GPP.

S703: access and mobile management function to ps domain entity access net by 3GPP and send second message to user equipment.

Wherein, which is in Idle state in the side N3GPP, which is used to indicate user equipment should After PDU session shifts to the side 3GPP from N3GPP lateral incision, pass through the connection that 3GPP accesses the network recovery PDU session.

S704: user equipment is after receiving second message, by the context bindings of the PDU session to the side 3GPP.

Wherein, the PDU that the side N3GPP is established is stored in user equipment and access and mobile management function to ps domain entity The context of session needs to access and mobile management function to ps domain is real if wanting the connection for accessing the network recovery PDU session by 3GPP The context bindings for the PDU session that body stores itself are to the side 3GPP, it is also necessary to the PDU meeting that user equipment stores itself The context bindings of words are to the side 3GPP.

S705: user equipment accesses net by 3GPP and initiates service request, and request restores the connection of the PDU session.

In connection restoration methods shown in Fig. 7, control plane functional entity can be before sending second message, and acquisition is used for Indicate that can the PDU session of the above-mentioned side N3GPP foundation shift to the network strategy of the side 3GPP from N3GPP lateral incision.If the network strategy The PDU session for indicating that the above-mentioned side N3GPP is established cannot shift to the side 3GPP from N3GPP lateral incision, then access and mobile management function Energy entity then can indicate that user equipment pass through N3GPP and access by sending second message with reference to the step in above-described embodiment A The connection for the PDU session that the above-mentioned side N3GPP of network recovery is established.If the network strategy indicates the PDU session that the above-mentioned side N3GPP is established The side 3GPP can be shifted to from N3GPP lateral incision, then executes above-mentioned steps S703~S705.

Specifically, it accesses and the mode of mobile management function to ps domain entity acquisition network strategy includes but is not limited to following two Kind: access and mobile management function to ps domain entity obtain network strategy from UDM or PCF in above-mentioned PDU session establishment；Alternatively, connecing Enter and obtains network strategy from UDM or PCF when receiving first message with mobile management function to ps domain entity.

As previously mentioned, connection can be carried in the second message that access and mobile management function to ps domain entity are sent to user equipment Restore instruction, connection restore instruction may include one or more of: PDU session identification, the PDU session wireless access class Type or the PDU session connect network identification.In addition, if connection restores in instruction to include the PDU session identification, then user sets It is standby that when initiation service request, the PDU session identification can be carried in the service request in S705.

In method shown in Fig. 7, access and mobile management function to ps domain entity are arrived by the context bindings of PDU session Behind the side 3GPP, access and mobile management function to ps domain entity indicate user equipment by the PDU session by the instruction of second message Context bindings access the above-mentioned PDU meeting for being transferred to Idle state and establishing before in the side N3GPP of network recovery to the side 3GPP, and by 3GPP The connection of words.User equipment, by the context bindings of above-mentioned PDU session to the side 3GPP, then leads to after receiving second message It crosses 3GPP access net to initiate to restore the service request of the PDU session, be built before in the side N3GPP to restore the above-mentioned Idle state that is transferred to The connection of vertical PDU session.Therefore, using connection restoration methods shown in Fig. 7,3GPP can be passed through respectively in user equipment Net and N3GPP access net core network access and user equipment are accessed when the side N3GPP is in Idle state, providing one kind makes user Equipment is converted to the connection recovery scheme of connected state in the side N3GPP from Idle state, builds so that user equipment restores the above-mentioned side N3GPP The connection of vertical PDU session guarantees the downlink data energy Successful transmissions of the side N3GPP.

In addition, method shown in Fig. 7 applies also for following scene: when user equipment respectively by 3GPP access net and N3GPP access net core network access and user equipment be in connected state in the side N3GPP, but the user face of the PDU session connects and do not have When establishing, this method also can be used and realize that access and mobile management function to ps domain entity access Netcom by 3GPP and know that user sets It is standby to restore the connection of the PDU session in the side 3GPP.

Based on connection restoration methods shown in Fig. 7, the embodiment of the present application also provides a kind of connection restoration methods, and this method is such as Shown in Fig. 8.Connection restoration methods shown in Fig. 8 can be considered a specific example of connection restoration methods shown in Fig. 7, Fig. 8 institute Show that the implementation for not explaining in detail and describing in method can refer to the associated description in method shown in Fig. 7.As shown in figure 8, should Method comprises the following steps:

Wherein, UE is in Idle state in the side N3GPP.

2a, UPF send downlink data notification message to SMF.

3a, SMF send N11 message to AMF.

Wherein, N11 message is a specific example of the first message in method shown in Fig. 7, and carrying in N11 message should PDU session identification.

4, AMF sends paging message to RAN.

Wherein, which carries connection and restores instruction, which restores instruction and be used to indicate user equipment should After PDU session shifts to the side 3GPP from N3GPP lateral incision, pass through the connection that 3GPP accesses the above-mentioned PDU session of network recovery.

Wherein, paging message is that AMF can access the PDU session by 3GPP according to the storage strategy determination of itself After network recovery, it is sent to UE's.AMF can be simultaneously by the context bindings of the PDU session to the side 3GPP, or UE is waited to initiate to restore Again by the context bindings of the PDU session to the side 3GPP after the service request of the PDU session.

Wherein, the mode that AMF obtains network strategy includes but is not limited to following two: AMF is in above-mentioned PDU session establishment Network strategy is obtained from UDM or PCF；Alternatively, AMF obtains network strategy from UDM or PCF when receiving N11 message.

Wherein, network strategy can also include the context of the PDU session of AMF itself storage.

Specifically, the context bindings of the PDU session to the step of side 3GPP can be executed by AMF, can also be notified by AMF SMF is executed.

5, paging message is transmitted to UE by RAN.

AMF the forwarding of RAN will connection restore instruction be sent to UE process can by notification message by way of realize, It can also be realized by way of paging message.When UE is when the side 3GPP is in Idle state, AMF will be connected extensive by the forwarding of RAN The process that multiple instruction is sent to UE is realized by way of paging message；When UE is when the side 3GPP is in connected state, AMF passes through The forwarding of RAN restores connection to indicate that the process for being sent to UE is realized by way of notification message.It is with paging message in Fig. 8 Example is illustrated.

6, UE after receiving the paging message, restores the instruction of instruction according to the connection carried in paging message, by the PDU The context bindings of session pass through the service request of the RAN initiation recovery PDU session to the side 3GPP.

UE initiates to restore the service request of the PDU session by RAN, i.e. UE accesses net by 3GPP and initiates to restore the PDU The service request of session.

It should be noted that the context bindings of the PDU session to the side 3GPP and UE are initiated service request by RAN by UE Two steps have no sequencing limitation.

7, UPF sends downlink data to UE by RAN.

UPF sends downlink data to UE by RAN, i.e. UPF accesses net by 3GPP and sends downlink data to UE.

Embodiment C

As shown in figure 9, being a kind of connection restoration methods provided by the present application.Method shown in Fig. 9 can be considered method shown in Fig. 4 A kind of implementation.Method shown in Fig. 9 comprises the following steps:

S901: access and mobile management function to ps domain entity receive the first message that conversation management functional entity is sent.

Wherein, first message carries first and restores to indicate, is used to indicate and restores the PDU that user equipment is established in the side N3GPP The connection of session.First, which restores instruction, can be the PDU session identification.

S902: access and mobile management function to ps domain entity access net by 3GPP and send second message to user equipment.

Wherein, which is in Idle state in the side N3GPP, which is used to indicate user equipment and restores above-mentioned The connection of PDU session, to receive downlink data.

S903: user equipment obtains storage strategy.

Wherein, which is used to indicate user equipment docking when initiating to restore the service request of PDU session and networks Selection strategy.

Specifically, user equipment obtains storage strategy, and can be realized by the following two kinds mode: user equipment is matched by user Set acquisition storage strategy；Or user equipment by access and mobile management function to ps domain entity obtain storage strategy, i.e., access and Storage strategy is handed down to user equipment by mobile management function to ps domain entity；Or user equipment passes through a PDU session from network Side obtains storage strategy.

S904: user equipment accesses the clothes that net initiates the recovery PDU session by N3GPP according to the instruction of storage strategy Business request；Or user equipment by the context bindings of the PDU session to the side 3GPP, and passes through according to the instruction of storage strategy 3GPP access net initiates to restore the service request of the PDU session.User equipment is by the context bindings of the PDU session to the side 3GPP Two steps of service request are initiated by RAN with user equipment and have no sequencing limitation.

For example, user configuration provides if the storage strategy is obtained by user configuration: if the downlink of the PDU session When data are video data, user equipment preferentially accesses the connection of the network recovery PDU session by N3GPP, to receive downlink Data.So, user equipment, then according to the instruction of storage strategy, accesses net by N3GPP and initiates to restore to be somebody's turn to do when executing S904 The service request of PDU session.It for another example, should if the storage strategy is obtained by access and mobile management function to ps domain entity Storage strategy instruction: user equipment preferentially accesses the connection of the network recovery PDU session by 3GPP.So, user equipment is being held When row S904, then according to the instruction of storage strategy, the service request that net initiates the recovery PDU session is accessed by 3GPP.

As previously mentioned, connection can be carried in the second message that access and mobile management function to ps domain entity are sent to user equipment Restore instruction, connection restore instruction may include one or more of: the PDU session identification, the PDU session wireless access Type or the PDU session connect network identification.In addition, if connection restores in instruction to include the PDU session identification, then user When equipment initiates service request in S904, the PDU session identification can be carried in the service request.

In the method as shown in figure 9, access and mobile management function to ps domain entity are receiving conversation management functional entity hair After the first message sent, net is accessed by 3GPP and sends second message to user equipment, user equipment is indicated by second message Restore the connection for the PDU session that the side N3GPP is established.User equipment, can be according to itself storage after receiving second message Policy selection accesses net by N3GPP or accesses the service request that net initiates the recovery PDU session by 3GPP, to receive The downlink data of the side N3GPP.Therefore, using connection restoration methods shown in Fig. 9,3GPP can be passed through respectively in user equipment Net and N3GPP access net core network access and user equipment are accessed when the side N3GPP is in Idle state, providing one kind makes user Equipment is converted to the connection recovery scheme of connected state in the side N3GPP from Idle state, so that user equipment restores the company of the PDU session It connects, guarantees downlink data energy Successful transmissions.

In addition, method shown in Fig. 9 applies also for following scene: when user equipment respectively by 3GPP access net and N3GPP access net core network access and user equipment be in connected state in the side N3GPP, but the user face of the PDU session connects and do not have When establishing, this method also can be used and realize access and mobile management function to ps domain entity by notifying UE restores should from the side 3GPP The connection of PDU session.

Based on connection restoration methods shown in Fig. 9, the embodiment of the present application also provides a kind of connection restoration methods, and this method is such as Shown in Figure 10.Connection restoration methods shown in Fig. 10 can be considered a specific example of connection restoration methods shown in Fig. 9, Figure 10 The implementation for not explaining in detail and describing in shown method can refer to the associated description in method shown in Fig. 9.As shown in Figure 10, This method comprises the following steps:

Wherein, UE is in Idle state in the side N3GPP.

2a, UPF send downlink data notification message to SMF.

Wherein, downlink data notification message, which is used to indicate UPF and receives in the PDU session that the side N3GPP is established, issues To the downlink data of UE, the PDU session identification is carried in downlink data notification message.

3a, SMF send N11 message to AMF.

Wherein, N11 message is a specific example of the first message in method shown in Fig. 9, and carrying in N11 message should PDU session identification.

4, AMF sends paging message to RAN.

Wherein, which, which carries to connect, restores instruction, which restores instruction and be used to indicate in user equipment recovery State the connection of PDU session.

5, paging message is transmitted to UE by RAN.

AMF the forwarding of RAN will connection restore instruction be sent to UE process can by notification message by way of realize, It can also be realized by way of paging message.When UE is when the side 3GPP is in Idle state, AMF will be connected extensive by the forwarding of RAN The process that multiple instruction is sent to UE is realized by way of paging message；When UE is when the side 3GPP is in connected state, AMF passes through The forwarding of RAN restores connection to indicate that the process for being sent to UE is realized by way of notification message.With paging message in Figure 10 For be illustrated.

6, after receiving the paging message, according to the instruction of the storage strategy of itself, selection is by N3IWF or passes through by UE RAN initiates to restore the service request of the PDU session.

UE initiates to restore the service request of the PDU session by N3IWF, i.e. UE is restored by N3GPP access net initiation should The service request of PDU session；UE initiates to restore the service request of the PDU session by RAN, i.e. UE accesses net by 3GPP and initiates Restore the service request of the PDU session.

7, UPF sends downlink data to UE.

If UE initiates to restore the service request of the PDU session by N3IWF, UPF sends lower line number to UE by N3IWF According to；If UE initiates to restore the service request of the PDU session by RAN, UPF sends downlink data to UE by RAN.

To sum up, connection restoration methods provided by the present application can access net access 5G core by N3GPP in user equipment Net and when user equipment is in Idle state, provides a kind of connection recovery side for making user equipment be converted to connected state from Idle state Case guarantees downlink data energy Successful transmissions.

The embodiment of the present application provides a kind of access and mobile management function to ps domain entity, the access and mobile management function to ps domain reality Body can be used for executing access and operation performed by mobile management function to ps domain entity in method shown in Fig. 2 or Fig. 3.Such as Figure 11 institute Show, the access and mobile management function to ps domain entity 1100 include receiver 1101, processor 1102, memory 1103 and transmitter 1104。

Receiver 1101, for receiving the first message of conversation management functional entity transmission, it is extensive that first message carries first Multiple instruction, is used to indicate the connection for restoring protocol Data Unit PDU session, wherein PDU session is user equipment in the side N3GPP It establishes；Processor 1102, for being performed the following operations by executing the program stored in memory 1103: when user equipment exists When the side N3GPP is in Idle state, storage first restores instruction；Receiver 1101 is also used to access net reception user by N3GPP The second message that equipment is sent, second message are periodic registration request or first service request；Transmitter 1104, for leading to It crosses N3GPP access net to restore to indicate to send third message to user equipment according to first, carries connection in third message and refer to Show that notifying user equipment restores the connection of PDU session；Alternatively,

Receiver 1101, for receiving the first message of conversation management functional entity transmission, it is extensive that first message carries first Multiple instruction, is used to indicate the connection for restoring protocol Data Unit PDU session, wherein PDU session is user equipment in the side N3GPP It establishes；Transmitter 1104 is also used to when user equipment is when the side N3GPP is in Idle state, to conversation management functional entity hair The 4th message is sent, it is unreachable that the 4th message is used to indicate user equipment.

Optionally, processor 1102 is also used to perform the following operations by executing the program stored in memory 1103: In After receiver 1101 receives the first message that conversation management functional entity is sent, data buffer storage timer is obtained；Transmitter 1104, when restoring to indicate to send third message to user equipment according to first by N3GPP access net, are specifically used for: working as data When dashpot timer has not timed out, net is accessed by N3GPP and restores instruction to user equipment transmission third message according to first.

Optionally, processor 1102 is also used to perform the following operations by executing the program stored in memory 1103: In Before transmitter 1104 sends the 4th message to conversation management functional entity, periodic registration next time is initiated according to user equipment The time of request judges whether to send the 4th message.

Optionally, first restores the session identification that instruction includes PDU session.

Optionally, it includes one or more of that connection, which restores instruction: the session identification of PDU, PDU session wireless access Type, PDU session connect network identification.

It should be noted that access and mobile management function to ps domain entity 1100 shown in Figure 11 can be used for executing Fig. 2 or Fig. 3 Shown in connection restoration methods in access and mobile management function to ps domain entity performed by operation, access and mobile management function to ps domain The implementation of not detailed description can be found in the associated description in method shown in Fig. 2 or Fig. 3 in entity 1100.

Figure 12 shows the another kind of access and mobile management function to ps domain entity (AMF) involved in above-described embodiment can The structural schematic diagram of energy.

Access and mobile management function to ps domain entity 1200 include communication unit 1201, processing unit 1202, storage unit 1203.The communication unit 1201 be used to support the user equipment in access and mobile management function to ps domain entity and above-described embodiment it Between receive and send messages.Processing unit 1202 also execute involved in Fig. 2 access and mobile management function to ps domain entity treatment process and/or Other processes for technology described herein.As an example, processing unit 1202 is for supporting access and mobility pipe Reason functional entity executes the process S201 to S205 in Fig. 2, and/or other processes for techniques described herein.Storage Unit 1203 is used to store the program code and data of access and mobile management function to ps domain entity.

It should be noted that being schematical, only a kind of logic function to the division of unit in the embodiment of the present application It divides, there may be another division manner in actual implementation.Each functional unit in the embodiment of the present application can integrate at one In processing unit, it is also possible to each unit and physically exists alone, a list can also be integrated in two or more units In member.For example, first acquisition unit and second acquisition unit can be the same unit, also different lists in above-described embodiment Member.Above-mentioned integrated unit both can take the form of hardware realization, can also realize in the form of software functional units.

The embodiment of the present application provides a kind of user equipment, and it is extensive which can be used for executing Fig. 2 or shown in Fig. 3 connection Operation performed by user equipment in compound method.As shown in figure 13, which includes transmitter 1301 and receiver 1302。

Transmitter 1301 sends second message to access and mobile management function to ps domain entity for accessing net by N3GPP, Second message is periodic registration request or first service request；Receiver 1302, for being connect by N3GPP access net Enter the third message sent with mobile management function to ps domain entity, carries connection in third message and restore instruction；Transmitter 1301, also Second service request is initiated for accessing to net by N3GPP, second service request is for requesting the connection of recovery PDU session, PDU Session is what user equipment was established in the side N3GPP.

Wherein, it includes one or more of that connection, which restores instruction: the session identification of PDU session, the wireless of PDU session connect Enter type, PDU session connects network identification.

It should be noted that user equipment 1300 shown in Figure 13 can be used for executing Fig. 2 or shown in Fig. 3 connection recovery side Operation performed by user equipment in method, the implementation of not detailed description can be found in shown in Fig. 2 or Fig. 3 in user equipment 1300 Associated description in method.

Figure 14 shows the alternatively possible structural schematic diagram of user equipment involved in above-described embodiment (UE).

User equipment 1400 includes communication unit 1401, processing unit 1402, storage unit 1403.The communication unit 1401 For supporting to receive and send messages between the access in user equipment and above-described embodiment and mobile management function to ps domain entity.Processing unit 1402 also execute the treatment process of user equipment involved in Fig. 2 and/or other processes for technology described herein.Make For example, processing unit 1402 is used to that user equipment to be supported to execute the process S201 to S205 in Fig. 2, and/or is used for this paper institute Other processes of the technology of description.Storage unit 1403 is used to store the program code and data of user equipment.

The embodiment of the present application provides a kind of access and mobile management function to ps domain entity, the access and mobile management function to ps domain reality Body can be used for executing in Fig. 4~any connection restoration methods shown in Fig. 10 performed by access and mobile management function to ps domain entity Operation.As shown in figure 15, access and mobile management function to ps domain entity 1500 include receiver 1501, transmitter 1502.In addition, also It may include processor 1503 and memory 1504.

Receiver 1501, for receiving the first message of conversation management functional entity transmission, it is extensive that first message carries first Multiple instruction, is used to indicate the connection for restoring protocol Data Unit PDU session, wherein PDU session is user equipment in the side N3GPP It establishes；Transmitter 1502 is used for when user equipment is when the side N3GPP is in Idle state, by 3GPP access net according to first Restore instruction and send second message to user equipment, second message is used to indicate the connection that user equipment restores PDU session.

Optionally, transmitter 1502 is restoring to indicate that sending second to user equipment disappears according to first by 3GPP access net Breath, second message is used to indicate user equipment when restoring the connection of PDU session, is specifically used for: when determining user equipment in 3GPP When side is in connected state, net is accessed by 3GPP and restores to indicate to send a notification message to user equipment according to first, notification message Middle carrying connection restores instruction, and connection restores instruction and is used to indicate the connection that user equipment restores PDU session；Alternatively, when determining User equipment accesses net by 3GPP and restores instruction to user equipment transmission paging according to first when the side 3GPP is in Idle state Message carries connection in paging message and restores instruction, and connection restores instruction and is used to indicate the company that user equipment restores PDU session It connects.

Optionally, second message is used to indicate the connection that user equipment accesses network recovery PDU session by N3GPP.

Optionally, processor 1503 is used to perform the following operations by executing the program stored in memory 1504: connecing Receive device 1501 receive the first message that conversation management functional entity is sent after, transmitter 1502 sends to user equipment and second disappears Before breath, by the context bindings of PDU session to the side 3GPP；Wherein, second message is used to indicate user equipment by PDU session After the side 3GPP is shifted to from N3GPP lateral incision, pass through the connection that 3GPP accesses network recovery PDU session.

Optionally, processor 1503 is also used to perform the following operations by executing the program stored in memory 1504: In Before the context bindings of PDU session to the side 3GPP, network strategy is obtained, network strategy is used to indicate PDU session can be from N3GPP lateral incision shifts to the side 3GPP.

Optionally, processor 1503 is specifically used for when obtaining network strategy: in PDU session establishment from normalization number Network strategy is obtained according to management UDM or policy control functions entity PCF；Or it is obtained when receiving first message from UDM or PCF Take network strategy.

Optionally, it includes one or more of that connection, which restores instruction: the session identification of PDU session, PDU session it is wireless Access style, PDU session connect network identification.

It should be noted that access shown in figure 15 and mobile management function to ps domain entity 1500 can be used for executing Fig. 4~figure Access and operation performed by mobile management function to ps domain entity, access and mobility pipe in any connection restoration methods shown in 10 The implementation of not detailed description can be found in the associated description in method shown in Fig. 4~Figure 10 in reason functional entity 1500.

Figure 16 shows the another kind of access and mobile management function to ps domain entity (AMF) involved in above-described embodiment can The structural schematic diagram of energy.

Access and mobile management function to ps domain entity 1600 include communication unit 1601, processing unit 1602, storage unit 1603.The communication unit 1601 be used to support the user equipment in access and mobile management function to ps domain entity and above-described embodiment it Between receive and send messages.Processing unit 1602 also execute involved in Fig. 4 access and mobile management function to ps domain entity treatment process and/or Other processes for technology described herein.As an example, processing unit 1602 is for supporting access and mobility pipe Reason functional entity executes the process S401 to S403 in Fig. 4, and/or other processes for techniques described herein.Storage Unit 1603 is used to store the program code and data of access and mobile management function to ps domain entity.

The application provides a kind of user equipment, and it is extensive which can be used for executing Fig. 4~any connection shown in Fig. 10 Operation performed by user equipment in compound method.As shown in figure 17, which includes receiver 1701, transmitter 1702.In addition, also may include processor 1703 and memory 1704.

Receiver 1701 is received for when user equipment is when the side N3GPP be in Idle state, passing through 3GPP access net and is accessed The second message sent with mobile management function to ps domain entity, second message, which is used to indicate, restores protocol Data Unit PDU session Connection, wherein PDU session is what user equipment was established in the side N3GPP；Transmitter 1702, for initiating service request, service is asked Ask the connection for requesting recovery PDU session.

Optionally, net receives access to receiver 1701 and mobile management function to ps domain entity is sent the being accessed by 3GPP When two message, it is specifically used for: when user equipment is when the side 3GPP is in connected state, passes through 3GPP access net and receive access and mobile Property the notification message that sends of management function entity, connection is carried in notification message restores instruction, and connection restores instruction and is used to indicate The connection of user equipment recovery PDU session；Alternatively, accessing net by 3GPP when user equipment is when the side 3GPP is in Idle state The paging message of access and the transmission of mobile management function to ps domain entity is received, connection is carried in paging message and restores instruction, connection is extensive Multiple instruction is used to indicate the connection that user equipment restores PDU session.

Optionally, transmitter 1702 is specifically used for when initiating service request: accessing net initiation service by N3GPP and asks It asks；

Wherein, second message is used to indicate the connection that user equipment accesses network recovery PDU session by N3GPP.

Optionally, processor 1703 is used to perform the following operations by executing the program stored in memory 1704: sending out Before sending device 1702 to initiate service request, restore the context of instruction and itself storage according to connection, determination is connect by N3GPP It networks and initiates service request；Transmitter 1702 is specifically used for when initiating service request: accessing net by N3GPP and initiates service Request.

Optionally, processor 1703 is also used to perform the following operations by executing the program stored in memory 1704: In Before transmitter 1702 initiates service request, by the context bindings of PDU session to the side 3GPP；Transmitter 1702 is initiating to service When request, it is specifically used for: net is accessed by 3GPP and initiates service request.Wherein, second message is used to indicate user equipment and is inciting somebody to action After PDU session shifts to the side 3GPP from N3GPP lateral incision, pass through the connection that 3GPP accesses network recovery PDU session.

Optionally, processor 1703 is also used to perform the following operations by executing the program stored in memory 1704: In Receiver 1701 by 3GPP access net receive access and mobile management function to ps domain entity send second message after, transmitter Before 1702 initiate service requests, storage strategy is obtained, storage strategy is used to indicate user equipment when initiating service request pair Access the selection strategy of net；Transmitter 1702 is specifically used for when initiating service request: according to the instruction of storage strategy, passing through N3GPP access net initiates service request；Or the instruction according to storage strategy, by the context bindings of PDU session to the side 3GPP, And net is accessed by 3GPP and initiates service request.

Optionally, processor 1703 is specifically used for when obtaining storage strategy: obtaining storage strategy by user configuration； Or storage strategy is obtained by access and mobile management function to ps domain entity.

Optionally, the session identification of PDU session can be carried in service request.

It should be noted that user equipment 1700 shown in Figure 17 can be used for executing any company shown in Fig. 4~Figure 10 Operation performed by user equipment in restoration methods is connect, the implementation of not detailed description can be found in Fig. 4 in user equipment 1700 Associated description in method shown in~Figure 10.

Figure 18 shows the alternatively possible structural schematic diagram of user equipment involved in above-described embodiment (UE).

User equipment 1800 includes communication unit 1801, processing unit 1802, storage unit 1803.The communication unit 1801 For supporting to receive and send messages between the access in user equipment and above-described embodiment and mobile management function to ps domain entity.Processing unit 1802 also execute the treatment process of user equipment involved in Fig. 4 and/or other processes for technology described herein.Make For example, processing unit 1802 is used to that user equipment to be supported to execute the process S201 to S205 in Fig. 4, and/or is used for this paper institute Other processes of the technology of description.Storage unit 1803 is used to store the program code and data of user equipment.

It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more, The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces The form of product.

The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

Obviously, those skilled in the art can carry out various modification and variations without departing from this Shen to the embodiment of the present application Please embodiment spirit and scope.In this way, if these modifications and variations of the embodiment of the present application belong to the claim of this application And its within the scope of equivalent technologies, then the application is also intended to include these modifications and variations.

Claims

1. a kind of connection restoration methods characterized by comprising

When user equipment is when the side N3GPP is in Idle state, the user equipment accesses net by 3GPP and receives access and movement Property management function entity send second message, the second message be used to indicate restore protocol Data Unit PDU session company It connects, wherein the PDU session is what the user equipment was established in the side N3GPP；

The user equipment initiates service request, and the service request is used to request to restore the connection of the PDU session.

2. method described in claim 1, which is characterized in that the user equipment accesses net by 3GPP and receives access and movement Property management function entity send second message, comprising:

When the user equipment is when the side 3GPP is in connected state, the user equipment accesses net by 3GPP and receives the access The notification message sent with mobile management function to ps domain entity carries connection in the notification message and restores instruction, and the connection is extensive Multiple instruction is used to indicate the connection that the user equipment restores the PDU session.

3. method described in claim 1, which is characterized in that the user equipment accesses net by 3GPP and receives access and movement Property management function entity send second message, comprising:

When the user equipment is when the side 3GPP is in Idle state, the user equipment accesses net by 3GPP and receives the access The paging message sent with mobile management function to ps domain entity carries connection in the paging message and restores instruction, and the connection is extensive Multiple instruction is used to indicate the connection that the user equipment restores the PDU session.

4. method according to claim 1 or 2, which is characterized in that before the user equipment initiates service request, also wrap It includes:

The user equipment restores the context of instruction and itself storage according to connection, determines that accessing net by N3GPP initiates The service request；

The user equipment initiates service request, comprising:

The user equipment accesses net by N3GPP and initiates the service request.

5. a kind of device characterized by comprising

Receiver is received for when described device is when the side N3GPP be in Idle state, passing through 3GPP access net and is accessed and mobility The second message that management function entity is sent, the second message are used to indicate the connection for restoring protocol Data Unit PDU session, Wherein, the PDU session is what described device was established in the side N3GPP；

Transmitter, for initiating service request, the service request is used to request to restore the connection of the PDU session.

6. device described in claim 5, which is characterized in that the receiver is accessing net reception access and movement by 3GPP Property management function entity send second message when, be specifically used for:

When described device is when the side 3GPP is in connected state, passes through 3GPP access net and receive the access and mobile management function to ps domain The notification message that entity is sent carries connection in the notification message and restores instruction, and the connection restores to indicate to be used to indicate institute State the connection that device restores the PDU session.

7. device described in claim 5, which is characterized in that the receiver is accessing net reception access and movement by 3GPP Property management function entity send second message when, be specifically used for:

When described device is when the side 3GPP is in Idle state, passes through 3GPP access net and receive the access and mobile management function to ps domain The paging message that entity is sent carries connection in the paging message and restores instruction, and the connection restores to indicate to be used to indicate institute State the connection that device restores the PDU session.

8. such as device described in claim 5 or 6, which is characterized in that the transmitter is specific to use when initiating service request In: net is accessed by N3GPP and initiates the service request；

Wherein, the second message is used to indicate the connection that described device accesses PDU session described in network recovery by N3GPP.

9. such as device described in claim 5 or 6, which is characterized in that further include:

Processor, for being performed the following operations by executing the program stored in memory: initiating service in the transmitter and ask Before asking, restore the context indicated and itself is stored according to connection, determines that accessing the net initiation service by N3GPP asks It asks；

The transmitter is specifically used for when initiating service request:

Net, which is accessed, by N3GPP initiates the service request.

10. method according to claim 2 or the device as described in weighing and require 6, which is characterized in that the connection restores instruction Include one or more of: the session identification of the PDU session, the wireless access type of the PDU session, the PDU meeting Words connect network identification.

11. requiring 5~10 described in any item devices such as the described in any item methods of claim 2~4 or as weighed, feature exists In carrying the session identification of the PDU session in the service request.

12. the device as described in claim 5-11 is any, which is characterized in that further include: described device is user equipment.

13. a kind of connection restoration methods characterized by comprising

Access and mobile management function to ps domain entity receive the first message that conversation management functional entity is sent, and the first message is taken Band first restores instruction, is used to indicate the connection for restoring protocol Data Unit PDU session, wherein the PDU session is the use Family equipment is established in the side N3GPP；

When the user equipment is when the side N3GPP is in Idle state, the access and mobile management function to ps domain entity are according to first Restore instruction, net is accessed by 3GPP and sends second message to the user equipment, the second message is used to indicate the use Family equipment restores the connection of the PDU session.

14. method as claimed in claim 13, which is characterized in that the access and mobile management function to ps domain entity are according to first Restore instruction, net is accessed by 3GPP and sends second message to the user equipment, the second message is used to indicate the use Family equipment restores the connection of the PDU session, comprising:

The access and mobile management function to ps domain entity determine the user equipment when the side 3GPP is in connected state, and first restores Instruction accesses net by 3GPP and sends a notification message according to the user equipment, and connection is carried in the notification message and is referred to Show, the connection restores instruction and is used to indicate the connection that the user equipment restores the PDU session.

15. method as claimed in claim 13, which is characterized in that the access and mobile management function to ps domain entity pass through 3GPP It accesses net and restores instruction to user equipment transmission second message according to first, the second message is used to indicate the user Equipment restores the connection of the PDU session, comprising:

The access and mobile management function to ps domain entity determine the user equipment when the side 3GPP is in Idle state, according to first Restore instruction and paging message is sent to the user equipment by 3GPP access net, carries connection in the paging message and refer to Show, the connection restores instruction and is used to indicate the connection that the user equipment restores the PDU session.

16. method according to claim 13 or 14, which is characterized in that the second message is used to indicate the user equipment The connection of PDU session described in network recovery is accessed by N3GPP.

17. a kind of access and mobile management function to ps domain entity characterized by comprising

Receiver, for receiving the first message of conversation management functional entity transmission, the first message carries first and refers to Show, be used to indicate the connection for restoring protocol Data Unit PDU session, wherein the PDU session is that the user equipment exists What the side N3GPP was established；

Transmitter is used for when the user equipment is when the side N3GPP is in Idle state, by 3GPP access net according to the first recovery It indicates to send second message to the user equipment, the second message is used to indicate the user equipment and restores the PDU meeting The connection of words.

18. access as claimed in claim 17 and mobile management function to ps domain entity, which is characterized in that the transmitter is passing through 3GPP accesses net and restores instruction to user equipment transmission second message according to first, and the second message is used to indicate described When user equipment restores the connection of the PDU session, it is specifically used for:

When determining the user equipment when the side 3GPP is in connected state, instruction is restored to institute according to first by 3GPP access net It states user equipment to send a notification message, connection is carried in the notification message and restores instruction, the connection restores instruction for referring to Show that the user equipment restores the connection of the PDU session.

19. access as claimed in claim 17 and mobile management function to ps domain entity, which is characterized in that the transmitter is passing through 3GPP accesses net and restores instruction to user equipment transmission second message according to first, and the second message is used to indicate described When user equipment restores the connection of the PDU session, it is specifically used for:

When determining the user equipment when the side 3GPP is in Idle state, instruction is restored to institute according to first by 3GPP access net It states user equipment and sends paging message, connection is carried in the paging message and restores instruction, the connection restores instruction for referring to Show that the user equipment restores the connection of the PDU session.

20. access and mobile management function to ps domain entity as described in claim 17 or 18, which is characterized in that the second message It is used to indicate the connection that the user equipment accesses PDU session described in network recovery by N3GPP.

21. such as the described in any item methods of claim 13~16 or such as the described in any item accesses of claim 17~20 and shifting Mobility management functional entity, which is characterized in that described first restores the session identification that instruction includes the PDU session.

22. such as the described in any item methods of claim 13~16 or such as the described in any item accesses of claim 17~20 and shifting Mobility management functional entity, which is characterized in that it includes one or more of that the connection, which restores instruction: the PDU session Session identification, the wireless access type of the PDU session, the PDU session connect network identification.

23. a kind of connection restoration methods characterized by comprising

When the user equipment is when the side N3GPP is in Idle state, the access and mobile management function to ps domain entity are to the meeting It talks about management function entity and sends the 4th message, it is unreachable that the 4th message is used to indicate the user equipment.

24. method as claimed in claim 23, which is characterized in that in the access and mobile management function to ps domain entity to described Conversation management functional entity is sent before the 4th message, further includes:

It is described access and mobile management function to ps domain entity according to the user equipment initiate next time periodic registration request when Between judge whether to send the 4th message.

25. a kind of access and mobile management function to ps domain entity characterized by comprising

The transmitter, for when the user equipment is when the side N3GPP is in Idle state, Xiang Suoshu conversation management functional entity The 4th message is sent, it is unreachable that the 4th message is used to indicate the user equipment.

26. access as claimed in claim 25 and mobile management function to ps domain entity, which is characterized in that the processor is also used to It is performed the following operations by executing the program stored in memory:

Before the transmitter sends the 4th message to the conversation management functional entity, under being initiated according to the user equipment The time of periodic registration request judges whether to send the 4th message.

27. the method as described in claim 23 or 24, or access and mobile management function as described in claim 25 or 26 Energy entity, which is characterized in that described first restores the session identification that instruction includes the PDU session.

28. the method as described in claim 23 or 24, or access and mobile management function as described in claim 25 or 26 It can entity, which is characterized in that the connection restores instruction and includes one or more of: the session identification of the PDU, described The wireless access type of PDU session, the PDU session connect network identification.

29. a kind of computer readable storage medium, which is characterized in that program is stored on the storage medium, when program is run When, it realizes such as Claims 1-4, method described in any one of 13 to 16,23 to 24.